What to Expect on the Last Day of New York Fashion Week

The sun is sure to rise, the weather’s set (for once) to hold and New York Fashion Week is to tramp through its inevitable finale.

Congratulations, all and sundry: You have made it to the end. But not before a day of fewer — but in most cases, bigger — shows. There is newness to be found (the first presentation for the Italian contemporary label Blue Les Copains by Peter Som, who canceled his own show this season), but by New York Fashion Week’s closing on Thursday, the long-established names rule.

Ralph Lauren, New York’s éminence grise in sneakers, shows his women’s collection first, at 10 a.m. He has been playing up Polo for women, which this season was presented alongside its male counterpart. The Ralph runway will be saved for the most exquisite stuff, so expect high froth.

At J. Mendel, the gowns may be big; the audience, not so much. The celebrity and red-carpet favorite trimmed its invite list this season, and it is forsaking Lincoln Center for a quieter space downtown at 1 p.m. It is just a hop and a skip from Calvin Klein Collection at 2.

The final bow will come from Marc Jacobs, whose fall collection hits the runway at 6 p.m. on the dot. (After years of hourslong delays, Mr. Jacobs now starts his shows to the minute, with Swiss watch efficiency.)

Of course, not everyone will be there to see it. London Fashion Week begins on Friday, drawing many visiting editors back, and the double-whammy of the Oscars and a Tom Ford show is taking others to Los Angeles. As sure as the sun is set to rise, Fashion Week — one way or another, in one city or another — goes marching internationally on.